78 LECTURES AND ESSAYS important point is that science, though ap- parently transformed into pure knowledge, has yet never lost its character of being a craft; and that it is not the knowledge itself which can rightly be called science, but a special way of getting and of using knowledge. Namely, science is the getting of knowledge from experi- ence on the assumption of uniformity in nature, and the use of such knowledge to guide the actions of men. And the most abstract state- ments or propositions in science are to be re- garded as bundles of hypothetical maxims packed into a portable shape and size. Every scientific fact is a shorthand expression for a vast number of practical directions: if you want so-and-so, do so-and-so. If with this meaning of the word " Science," there is such a thing as a scientific basis of Morals, it must be true that,— 1, The maxims of Ethic are hypothetical maxims 2, Derived from experience 3, On the assumption of uniformity in nature. These propositions I shall now endeavour to prove; and in conclusion, I shall indicate the direction in which we may look for those general statements of fact whose organisation will complete the likeness of ethical and physical science.